Code cleanup; make several boards compile & link.
diff --git a/drivers/usbtty.c b/drivers/usbtty.c
index 7e553b3..ce4a12e 100644
--- a/drivers/usbtty.c
+++ b/drivers/usbtty.c
@@ -314,7 +314,7 @@
 	int rc;
 	char * sn;
 	int snlen;
-	
+
 	if (!(sn = getenv("serial#"))) {
 		sn = "000000000000";
 	}